SCHLUMBERGER DL-,01 revenue for the last year amounted to 35.05 B EUR, the most of which — 12.90 B EUR — came from its highest performing source at the moment, Well Construction, the year earlier bringing 12.21 B EUR. The greatest contribution to the revenue figure was made by Middle East & Asia — last year it brought SCHLUMBERGER DL-,01 12.58 B EUR, and the year before that — 9.98 B EUR.